Captain America

So, they're going to keep the origin story in the original timeframe and the first villian will be Red Skull...

"Virtually the entire story except the bookends are in World War II because we all recognize we have one chance to tell the origin story of how he became Captain America, you can't tell a modern story and then go back and tell the origin story. If you're going to do it, let's do it. Let's do it first. Everyone wanted to tell an origin story. There was a version where it was a modern story and it didn't work."
- Joe Johnston

And, they're going to explain the flag costume by making Captain America a touring USO show character gimmick. Later, when the fighting gets serious, Cap modifies his uniform into armor and tones down the colors.

http://www.comicbookmovie.com/fansites/portals/news/?a=14675